2000001220 has 48 divisors (see below), whose sum is σ = 4803539328. Its totient is φ = 685209600.

The previous prime is 2000001187. The next prime is 2000001229. The reversal of 2000001220 is 221000002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (2000001229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219679 + ... + 228601.

It is an arithmetic number, because the mean of its divisors is an integer number (100073736).

Almost surely, 2^2000001220 is an apocalyptic number.

2000001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000001220 is an abundant number, since it is smaller than the sum of its proper divisors (2803538108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2000001220 is a wasteful number, since it uses less digits than its factorization.

2000001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540 (or 10538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2000001220 is about 44721.3731900084. The cubic root of 2000001220 is about 1259.9213060788.

Adding to 2000001220 its reverse (221000002), we get a palindrome (2221001222).

The spelling of 2000001220 in words is "two billion, one thousand, two hundred twenty".